package com.apache.netty.codec;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;

public class NettyClientHandler extends ChannelInboundHandlerAdapter {

  // 当通道就绪就会触发该方法
  @Override
  public void channelActive(ChannelHandlerContext ctx) throws Exception {

    // 发生一个Student 对象到服务器

    StudentPOJO.Student student =
        StudentPOJO.Student.newBuilder().setId(4).setName("智多星 吴用").build();
    // Teacher , Member ,Message
    ctx.writeAndFlush(student);
  }

  // 当通道有读取事件时，会触发
  @Override
  public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {

    ByteBuf buf = (ByteBuf) msg;
    System.out.println("服务器回复的消息:" + buf.toString(CharsetUtil.UTF_8));
    System.out.println("服务器的地址： " + ctx.channel().remoteAddress());
  }

  @Override
  public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
    cause.printStackTrace();
    ctx.close();
  }
}
